/Engine/Source/Editor/GraphEditor/Public/SGraphActionMenu.h
Called when tree item is selected
void OnItemSelected ( [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FGraphActionNode](API\Editor\GraphEditor\FGraphActionNode) > InSelectedItem, [ESelectInfo::Type](API\Runtime\SlateCore\Types\ESelectInfo__Type) SelectInfo )